Income Taxes - Components of Provision and Current Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 118,080	$ 120,134	$ 116,933
State and local	20,253	24,900	21,225
Total current	138,333	145,034	138,158
Deferred:
Federal	2,211	(10,386)	(8,960)
State and local	1,107	(5,201)	(1,626)
Total deferred	3,318	(15,587)	(10,586)
Total provision for income taxes	141,651	129,447	$ 127,572
Receivables
Current income tax receivable due from various jurisdictions	$ 39,800	$ 54,500